Vulkan - No way to view samplers if they are in a separate descriptor set?

Developer Tools Nsight Graphics
1

Nsight Graphics Version 2018.7.0.0

Hi!

Just wondering if there is any way to view samplers when doing a Vulkan capture in Nsight if the Images and Samplers are in separate descriptor sets.

We’ve got our Images in Descriptor Set 2 and Samplers in Set 1.

But under the FS view in API Inspector View, it only shows our images all from Descriptor Set 2 and none of the samplers.

Is this a missing feature or perhaps we’re doing something wrong?

Thanks!

Alex

2

Hi Alex,

Sorry for the confusion! This view should show the samplers.

In that particular view, we don’t support VK_DESCRIPTOR_TYPE_SAMPLER descriptors, which is why your samplers are not showing up. So, you are not doing anything wrong.

I’ll submit a bug for the development team and can get back to you once we have scheduled a fix! (DG-3678)

Thanks,
Seth

3

Hi Alex,

We just released Nsight Graphics 2019.1 that has support for VK_DESCRIPTOR_TYPE_SAMPLER! This should fix your issue. Give the new build a try and let me know if it works for you!

Thanks,
Seth

4

Hi Seth!

I’ve given the new build a try this morning, where should I be looking to see the samplers? I expected them to be in the API Inspector View → FS → Images & Samplers for the current draw but I still only see the images.

Alex

5

Hi Alex,

Very interesting. That is exactly where they should show up. Let us do some investigation and see if we missed anything.

If your app is shareable, feel free to PM me with a link. That would greatly accelerate the investigation.

Sorry again for the issue!

Seth

6

Hi Seth,

If it helps, our structure is that we have all Uniforms in Set 0, all samplers at Set 1 and all Images at Set 2. We have a total of 16 images and 16 samplers valid at any time.

We can’t share the project I’m afraid, if I get time I could try to setup a test project which uses samplers in the same was as us but can’t promise anything.

Alex

7

Hi Alex,

Thanks for the Info.

I just talked to one of our engineers and he may have been able to repro this with a sample! I’ll keep you updated.

Thanks,
Seth

8

Hi Seth. Any update on this?

Thanks,

Alex

9

Hi Alex,

We have had some progress. We were able to repro the issue with a different sample and we have a fix.

Unfortunately, our next release is mid-march, so i’m seeing what we can do to potentially get you a build sooner.

Thanks,
Seth

10

Hi Seth! I notice 2019.2 has now been released, should I expect the fix in this build?

Also notice Vulkan profiling support has been added, a great addition!

Alex

11

Hi Alex,

Yep! 2019.2 should have your fix. Additionally, it did add VK profiling support as well!

Let me know if there are any other issues.

Cheers,
Seth